#include <stdio.h>

//这是一个注释
/*
#define MAX 10
int main()
{
    int arr[MAX] = {1,2,3,4,5,6,7,8,9,10};
    for(int i = 0;i<MAX;i++)
    {
        printf("%d ", arr[i]);
    }
    return 0;
}*/

extern int Add(int x, int y);
int main()
{
    int a = 10;
    int b = 20;
    int sum = Add(a, b);
    printf("%d\n", sum);
    return 0;
}



